are you sure the answer is B? or the questio is asking range is >=2? if the question is asking range >=2, then the answer will be B. but if the question is asking whether range is >2, then the answer should be E, since range =2 is not equal to range >2. 简言之,有 5 个数,其中四个是3,4,5,5,问range是否大于2? 1) 平均数小于中数 2) 第五个数是4 答案:B 思路: 這題是B? 條件一中, 若是3,4,5,5,5,中數5,平均數4.4,range=2; 若是1,3,4,5,5,中數4,平均數3.6,range>2; 無法決定range大於2。 根据2,能推出range=2,但问题是问是否大于2,也是选B吗? open to discuss |